312 



Ocean Magnetic Observations, 1905-16 



NORTH AMERICA. 



United States — concluded. 

 Greenporl, Long Island, New York, 1909, 1910, 1913, 1914— 

 continued, 

 with United States Coast and Geodetic Survey station 

 of 1904. It is in northern part of school grounds just 

 south of row of large maple trees; marked by marble 

 post lettered on top "U.S.C.& G.S. 1904," with hole at 

 center marking precise point. Presbyterian Church 

 spire is in true bearing 203° 22^2. Station B is 52.7 

 feet (16.06 meters) from station A in line from A to 

 spire of Catholic Church. Catholic Church spire is 

 in true bearing 45° 2714. 



Nciv York (Bronx Park), New York, 1909, 1910.— Station A 

 iu Botanical Gardens of Bronx Park, east of Botan- 

 ical Museum and east of the Bronx River, at the 

 highest point, and near center of open space south- 

 east of stone hut. The southwest corner of stone hut 

 is distant 193.6 feet (59.02 meters), a lamp-post on the 

 west side of park road is 74.6 feet (22.73 meters) to 

 the east-northeast, and a second lamp-post is 93.2 feet 

 (28.41 meters) to the southeast on the east side of 

 park road. T?he station of the U. S. Coast and 

 Geodetic Survey is distant 129.5 feet (39.45 meters) 

 to the west. The station is marked by a heavy wedge 

 about 16 inches (40 cm.) long, projecting about 4 

 inches (10 cm.) above the general surface. True bear- 

 ings: flagpole on police station, 128° 37^0; southwest 

 corner of stone hut, 166° 33! 8. An auxiliary station, 

 B, was estabhshed on the line joining the main station 

 with flagpole on police station of Precinct No. 79, 

 produced northwestwardly 67.3 feet (20.5 meters). 

 This point is about 2^ feet (0.8 meter) lower than the 

 principal station and on the edge of a small bluff. 



SOUTH AMERICA. 

 Argentina. 



Buenos Aires, Victoria, 1911.^-Observations were made to 

 northwest of Victoria Cemetery about 200 meters 

 north of station of Argentine Meteorological Office. 



Pilar, Cordoba, 1911. — Four stations, Pier 1, Pier 8, 

 station B, and station C, were established at the 

 Magnetic Observatory; all in hne with observatory 

 mark No. 1 (black line painted on stone pier) which 

 is in true bearing 100° 14'.6. Pier 1, m absolute 

 house, is 139.2 meters east of mark No. 1, and is 

 observatory station for absolute determinations of dec- 

 lination and horizontal intensity. Pier S, in absolute 

 house, is 9.02 meters east of Pier 1, and is observatory 

 station for absolute determinations of inclination. 

 B is 33.04 meters east of Pier 8 in hne to mark No. 1 

 extended; marked by pier erected by observatory 

 authorities. C is 28.1 meters east of B in Une to mark 

 No. 1 extended; marked by pier erected by observa- 

 tory authorities. 



Brazil. 



Jaburu, Bahia, 1913. — Three stations, designated A, B, 

 and C, were occupied on Itaparica Island west of 

 Bahia and south of small pier at brick works, between 

 shore and road. A is on beach 65.2 meters south 

 of south rail of narrow-gage railway running from 

 brick works to pier, 4.6 meters from well-defined shore 

 line, 6.6 meters from nearest of three coconut trees 

 to northwest, and 16.6 meters east of wire fence. 

 True bearings: dome of prominent cathedral in 

 Bahia, 285° 4017; tip on San Antonio Lighthouse, 

 308° 1018; right-hand tip of white cornice on ruins, 

 353° 28(4. Primary station B is on line from A to 

 white cornice on ruins, 30.43 meters from A, 5.0 

 meters from shore line, 14.1 meters from fence on west 

 side of road; marked by tarred post, 4 feet (1.2 meters) 



SOUTH AMERICA. 



Brazil — continued. 



Jaburu, Bahia, 1913 — continued. 



long, and 3 by 5 inches (8 by 13 cm.) on top, lettered 

 "C.I.W." on south, and "191.3" on north side, with cross 

 near southwest corner of top to mark precise position, 

 and set so as to project about 6 inches (15 cm.) above 

 surface. True bearings: north edge of round tower 

 on hill above station, 82° 4219; church spire north of 

 Bahia, 247° 24 !4; dome of prominent cathedral in 

 Bahia, 285° 30!8; tip on San Antonio Lighthouse, 

 308° 03; 1; right-hand tip of white cornice on ruins, 

 353° 2814. C is in line with stations A and B, 32.30 

 meters south of B, 4.6 meters from the shore line, 

 4.85 meters and 9.57 meters from coconut trees to 

 northeast and southwest respectively, and 9.72 meters 

 from evergreen tree to southeast; marked by peg with 

 cross cut in top. True bearings: tip on San Antonio 

 Lighthouse, 307° 55 ( 1 ; right-hand tip of white cornice 

 on ruins, 3.53° 28'.4. 



Pernambuco, Pernambuco, 1913. — The United States 

 Coast and Geodetic Survey station of 1907 was found 

 obUterated by cutting away by ocean of shore of 

 Isthmus of Olinda. New station is within 150 yards 

 (137 meters) of 1907 station and about midway 

 between cable house and Port Buraco, but shghtly 

 nearer latter, 12 feet (3.7 meters) inland from ridge 

 along sea side of isthmus; marked by 3 large wooden 

 tripod pegs. True bearings: center of dome of Arse- 

 nal Marinha, 6° 1916; cross on old monument near 

 cable house, 16° 11 !8; tallest yellow spire of church, 

 25° 4812; red dome of Assembly Hall, 35° .59:7; chim- 

 ney of Beltrao Sugar Refinery, 158° 36(5; PicSo Light- 

 house,.341° 14(0. 



Pinheiro, Para, 1910. — Three stations. A, B, and C, were 

 occupied at this point. The stations are situated in 

 the town of Pinheiro on the east bank of the Para 

 River and about 10 miles (16 kilometers) north of the 

 city of Para. Station A is the same as the Brazilian 

 station of 1903. It is on the point of land directly in 

 front of the Sao Sebastiao Church and 69.5 meters 

 from its southwest comer; it is about 100 meters in the 

 direction northeast from end of government wharf and 

 about 10 meters from edge of steep river embankment. 

 This station is marked by concrete blocks 28 cm. 

 square by 4j cm. thick built up to a height of 76 cm. 

 On the top block there is a copper plate bearing the 

 date of the Brazilian observations, name of the 

 observer, latitude, longitude, and magnetic elements 

 at the time of observation. The exact point is at the 

 edge of copper plate directly over second "R" in the 

 word "Directoria"; this point is 8.9 cm. from 

 south edge of block and 11.8 cm. from east edge. 

 True bearings: large brick chimney in Para, 1° 36:2; 

 outer gable end of shelter house on pier at Pinheiro, 

 42° 20 :9; tip of spire of SHo Sebastiao Church, 262'^ 

 50;2. Station B is 15.6 meters from station A in the 

 line from station A to the large brick chimney in Para. 

 Station C is 15.85 meters from station B in line from 

 station B to large brick chimney in Para. 



Rio de Janeiro, Federal District, 1910. — Three stations, 

 A, B, and C, were occupied at Freitas Beach. They 

 are on the beach about 250 meters west of present 

 terminus of the Ipanema car line from Rio de Janeiro, 

 on grass-covered sand above the high-water mark. 

 Station B, the main station, is about 12 meters from 

 edge of grass and about 20 meters from ridge of a small 

 sand hill to the landward. It is marked by a wood 

 post 3 by 4 by 36 inches (8 by 10 by 91 cm.). True 

 bearings: center of top of pavilion on the summit of 

 Corcovado, 166°46:2; landward wireless telegraph pole 

 at the bottom, 279° 5218; Ughthouse on Raza Island, 

 326° 09:8. Station A is 23.6 meters 99° 52:8 west of 



